Steve 198

Hi we have a 02 is200 running standard 2ltr petrol we have put a stand alone fuel system in (kept blowing fuel Fuse last time out) with the modified throttle but now it will start and rev once then cut out like the fuel rail isn't getting any fuel the regulator/pump is pressured at 4bar ??? Anyone have any ideas

We are turning a is200 into a drift car but have a problem Last time out with original fuel delivery system it kept blowing the fuse so we put a stand alone fuel system in ( pressure regulator/pump/tank/lines) We looked online and done the throttle body modification But now it will start and rev once but cuts out after that Anyone have any ideas